package com.hjli.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginFilter implements Filter{

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		// TODO Auto-generated method stub
		HttpServletRequest req = (HttpServletRequest) request;
		HttpServletResponse resp = (HttpServletResponse) response;
		HttpSession session = req.getSession();

		// 获取到请求的地址
		String requestUrl = req.getRequestURI();
//		System.out.println("requestUrl:"+requestUrl);
		if(requestUrl.contains("/sys/")){
			if(requestUrl.contains("sys/login")||requestUrl.contains("sys/login/validate")){
//				System.out.println("登录页面");
				chain.doFilter(request, response);			
			}else{
//				System.out.println("非登录页面");
				if(session.getAttribute("user")==null){
					resp.sendRedirect("../sys/login");
				}else{
					chain.doFilter(request, response);	
				}
			}
		}else{
			chain.doFilter(request, response);	
		}
		
		
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

}
